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Duramax ecm problems. 124 posts · Joined 2008.

  • Duramax ecm problems. Nov 20, 2014 · Showed up customer said truck would not go over 45, speedometer doesn't work and check engine light. 2. 95k miles No history of fuel system or transmission work or previous problems. Kind of at a loss with it. 0 Duramax is comparatively a lot higher. Jul 2, 2012 · However I have checked all the wires til I'm blue in the face and just cannot find a problem with the harness so I bought a new cam sensor and ECM and I'm going to have the ECM flashed tomorrow and put it on. Despite its improved reliability, the Duramax LBZ is still prone to a number of common problems such as cracked pistons, water pump and glow plug failure, transmission line leaks, and EGR valve issues. After 6 weeks I finally received a new ECM from Flagship 1. Dec 28, 2019. Try again and rolls over a half then nothing. So harness and new tcm plus programming and laborer. Luckily it only cost me $140. I really think that's the problem. Therefore, a circuit condition on one sensor 5-volt reference circuit may affect multiple components. only thing is, the service engine soon light still comes on Nov 23, 2021 · So the other day I was replacing my engine harness 15 LML 6. The truck wont even try to crank which i believe is do to the ecm being dead. 0 Duramax Reliability. But no check engine light. 0 litre duramax diesel 10 days ago. Feb 9, 2023 · Bought a 2024 GMC sierra 1500 with the 3. HELP! History: Chevrolet 2003 Duramax (LB7 with Allison 1000). Third time no crank at all. Click the links below for more info. Pin/connector damage is very common and can be caused by corrosion, water intrusion, improper handling of the connector or improper testing methods (like shoving a test probe into a hole too small for the probe). Nov 17, 2016 · No crank, gauges dead, CTS programmer not connecting. garage said might be the switch so got that changed and was alright till yesterday. Had ecm checked out and it’s toast and not repairable. As is common with emissions equipment, this led to a new common problem for the Duramax LMM engine. Scanner showed coded U0100, U0101, and C0379. at 1322 mileage threw engine code for P2C7A . . Remanufactured Chevrolet 6. Sep 3, 2010 · A_T_Ver Discussion starter. Jul 19, 2018 · Hey guys, new here and have a question/need some input. I had it installed, and re tuned the ECM along with re tuned the TCM. Sep 7, 2018 · 2011 Duramax I’m having to get the wiring harness in the Allison transmission replaced due to oil leaking in the connector causing the TCM them to short out . 00 plus labour to install a new ECM . On a new note I have had several lbz ecm's lock up, have a pile of them stacked on shelf. im Getting no power to ecm which I can't communicate with it, tried new ecm and flashed it still nothing. Aside that truck runs really good, at dealer in pasadena they made it a horrible experience aside denting and scratching the truck. Aparantly I got the ECM and the Fuel Injection Control Unit confused. Understanding the Duramax LML Engine. 6L LLY Duramax Problems And How Do You Fix Them Most Common LLY Duramax Problems. May 20, 2022 · Have a 2022 redesigned sierra crew cab elevation 3. Apr 8, 2015 · The Duramax is NOT like the Ford Powerchoke or Dodge Cummins they make major changes, engine liter sizes and Ford just keeps going backwards. Dec 8, 2023 · When you encounter the “engine power reduced” message on your Duramax, it signifies that your truck’s onboard computer, or Engine Control Module (ECM), has detected a problem that could potentially harm the engine or impair its performance. The next day I replaced both head lamps by removing the battery on the driver's side and the filter on the passenger side. Dec 11, 2021 · Well this is a long story but I will try to make it short. After driving it for a week the front collision warning light came on. Programming included. Or so I thought. Truck was parked went to start truck, wouldnt start. Nov 11, 2023 · So as y'all probably know, ECM's for LMM's stopped being manufactured. LLY Duramax Submitted From @Minty_Dmaxx on Instagram What Are the Most Common 2004. The sensor won't be here until Monday so if the ECM doesnt fix it I'll try the cam sensor on Monday. Aug 30, 2019 · The guages were acting up except the voltage. We can get info from anything but the ecm, turn key everything acts as normal but the codes pop up, turn key will Aug 17, 2022 · Circuit/System DescriptionThe electronic brake control module (EBCM) and the engine control module (ECM) simultaneously control the traction control. Before diving into the specifics, it’s essential to comprehend that the Duramax LML engine is a significant chapter in diesel power for Chevrolet trucks, featuring robust performance and specific advancements over its predecessors. 5 LLY 2500HD 4X4 Duramax w/ Alison Transmission, Crew Cab, Short Bed, RCD 6" Lift, 4" Magnaflow Turbo Back, K&N, Inglewood Transmission Stage 4 Kit, AMP Elevated Steps, BF Goodrich 315-70-17 w/ Forged Weld Racing Wheels, Bullydog Trippledog Plug & Play and 90+HP Injectors These upgrades will help to ensure low voltage levels will not create problems for you. Apr 16, 2015 · I'm having some issues. Mar 21, 2018 · It certainly could be a wiring problem, but it could be either. If your ECM is setting the ratio incorrectly, this is the first time you’ll notice. Also the lights dim every 5 seconds or so when at idle, the voltage goes from 14. If you want to jump to a specific section, simply click on any of the bullet point links below. My problems are exactly the same as yours . Buddy had similar truck but not a diesel and same problem. Dec 12, 2020 · Here is a list of the 11 most common LLY Duramax problems and how to fix them. 6 since 2001 the changes they make are making certain parts stronger so they can produce more HP for the LMM and newer because of the emissions stuff added, still 6. Since I got my truck back the throttle response has been off, for instance when taking off from a dead stop there’s an Feb 1, 2022 · Many times, it isn't the fault of the ECM, but a problem with voltage drop somewhere in the circuit path. 0 Duramax has been way more reliable than EcoDiesels and 3. that dealer added 117 miles and kept it 10 day and from what I saw on ny dash cam the work they did in 10 days was maybe 1 hour and they drove 117 miles in Feb 7, 2022 · I blew the ECM in my 06 LBZ. I drove my 2008 Duramax from CO to TN ~1300 miles with no problem. They also replaced 2 sensors within the EGR for constant faulty readings. Duramax LBZ Engine Problems. Truck is a 2006 Silverado 2500HD, LBZ Duramax/Allison 6 speed. Apr 20, 2024 · Navigating these common problems helps keep your truck performing at its best. Codes are p0642 and p0802. Swap old harness out with new hooked everything up in its proper location. Drove to the store no problem, come out a half hour later and try to start it. In stock, ready to ship. I pull it in, hook up my Mac scanner and find a u1000, u0101 and u0106. Cold air intake, 100hp PPEI Kory Willis tune, EGR delete. Oct 15, 2019 · Well mechanic couldn’t find out anywhere, including calling Chevrolet, what the heck that fuse is for on the duramax engine. However the TCM still shows up. Show reduced power on the instrument panel and it feels down on power, maybe 75% of normal. All wires tested fine including generator signal wire but I’m not receiving signal from the ecm to kick the alternator on. Apr 11, 2022 · 2009 Silverado 2500HD CCSB LTZ Diesel FASS 95 Lift Pump (with Baldwin filters), Edge Evolution CTS2 Monitor w/Dash Pod Mount, Factory FF as Tertiary Filter, Bilstein 5100 Stock Height, Steel Diamond Plate Bed Rail Caps, AMP Research Bedstep, Fumoto oil drain valve, PS Oil cooler, Pioneer AVIC 7200NEX GPS/Stereo, Air Lift LoadLifter 5000 Air Bags. Jul 17, 2011 · ECM is done, buy new ECM and start from scratch. We found that there was an arcing from harmonic balancer to timing cover and so I replaced the balancer and no more arcing but the fuse is still blowing. Eventually discovered that grounding the ECM to the chassis would allow it to start. I performed all the usual checks: fuses, voltage,resistance of the high speed bus wires, etc. I plugged the 2 connectors that go to the ECM vice versa in other I connected the 2 in the wrong ports on the ECM. May 7, 2012 · 2005 Silverado EC/SB, LLY, 4WD, Edge CTS w/ EGT probe, LML Exhaust Manifold, PPE shimmed FPRV, Banks LBZ air cleaner, Profab intake, LBZ Turbo Mouthpiece, Kennedy twin lift pumps w/ megafilter, Corsa 304 SS Exhaust, Mike L tranny cooler, EXAXT Steering System, Redhead Power Steering Box w/ Amsoil PS fluid, Green Torsion Keys, Allison Deep Pan w/ Suncoast Filterlock and Transynd ATF, Bilstein Apr 25, 2018 · 6. Duramax High Output Alternators ('01-'07): 240Amp 320Amp 370Amp Duramax Big 3 Upgrade Kit ('02-'06): Wiring Kit Final Thoughts. Oct 21, 2015 · 2004 duramax ecm problems help!!!!! Jump to Latest 12K views 11 replies 3 participants last post by rickyglaim Oct 23, 2015 Aug 8, 2016 · hello everyone im new to this forum but not new to the diesel world. Just rolled 201k miles today. When certain ECM DTCs are set, the ECM will not be able to perform the torque reduction for traction control. 2 Injection Pump Failure; DEF Heater Problems; NOx Sensor Failure; DEF Pump Failure; The buzzkill of the LML is the CP4. 2L Diesel Engine Suspension & Steering - 2001 - 2010 Top Contributors this Month View All Nov 10, 2023 · Duramax LML Engine Problems. Nov 30, 2022 · Duramax 3. The do same with the other connector. Your engine is never as finicky about fuel-to-air ratio as it is when it’s first starting up. 5-2006 6. Ron Nielson - Most of the information I provide relates directly to my 2008 LMM - Your truck may be a little (or a lot) different May 25, 2018 · Tried jumping it incase it was the batteries with no luck. The Dmax has always been 6. This makes me concerned that Auto ECM quoted to rebuild my ECM when in fact they had my FICU. Your Car Won’t Start. 0 duramax . so i put some electric grease on there and it now activates every time i turn the ignition on. 9 when this happens Jan 7, 2016 · The engine control module (ECM) supplies 5 volts to components through 5-volt reference circuits. 0 back from the dealer after having the ECM replaced because of a short within the unit. New batteries, 3 different alternators, which all bench tested fine. i have 05 duramax 2500hd LLY, the drivetrain is completely stock, no programmer, no cold air intake and no exhaust. Problem: Mar 18, 2010 · Guy was very helpful. Going back to the original problem, the truck would either start (while pressing the accelerator) or it wouldnt, and would run rough when it did start. First of all, disconnect and reconnect one connector, then see if problem is fixed. Updated my 2007 GMC Classic LBZ at the dealer then loaded my PPE that was not updated and now the dealer wants $800. These 5-volt reference circuits are independent of each other outside the ECM, but are bussed together in three reference groups inside the ECM. How I have fixed it: Sep 24, 2020 · GM launched the LMM in 2007. Compared to gasoline engines of similar size and displacement, it offers better specs than gasoline engines. i am a diesel mechanic mostly heavy duty. Since I got my truck back the throttle response has been off, for instance when taking off from a dead stop there’s an insane amount of lag and then an instant Jan 18, 2022 · Reading reviews of Flagship seems to indicate that they give out a good rebuilt ECM about half the time, so I'm worried. There have been several people with various kinds of electrical problems that may be solved by your explanations, persistence in locating your problem, and detailed look at your truck's wiring and charging system. Pioneer AVIC-8200NEX Navigation Radio, Tailgate camera view moved from mirror to Navigation display, Pace Edwards Electric Bedlocker Tonneau Cover, with a 37 gallon Transfer Flow tank with Trax2 display, under it's canister, Chrome wheel opening moldings, Mirror mod, with forward led Apr 11, 2022 · 2009 Silverado 2500HD CCSB LTZ Diesel FASS 95 Lift Pump (with Baldwin filters), Edge Evolution CTS2 Monitor w/Dash Pod Mount, Factory FF as Tertiary Filter, Bilstein 5100 Stock Height, Steel Diamond Plate Bed Rail Caps, AMP Research Bedstep, Fumoto oil drain valve, PS Oil cooler, Pioneer AVIC 7200NEX GPS/Stereo, Air Lift LoadLifter 5000 Air Bags. truck would not start. There's a value embossed on the side of each injector that you must enter into the ECM with a software tool. Diesel Tuner's Blog 3 Tips to Prevent 2001-2005 Duramax ECM's From Crashing! Mar 18, 2010 · 6. Blown fuses are caused by shorts, and the ECM is not the prime suspect, UNLESS they can prove that the short is in the ECM. To strengthen emissions active regeneration was added alongside a DPF system. When I got to TN I parked it and noticed I had a head lamp out. Although General Motors recalled these engines and gave them a seven-year and 200,000-mile warranty, its fuel injector remained a significant problem. Also, the ECM they sold me is deleted, and that's why the DEF and soot PID are not showing on my Edge. Sep 24, 2018 · The posted wiring video was great. I would continue to explore those wires. Installed it and can't flash a tune. 0 ECM replacement issues. But if it’s happening along with one or more of these other symptoms, you may have a problem with your ECM. That's the P268 code. The next day I got the warning that my speed is reduced and take the truck to the dealership immediately. While the gas V8’s do suffer some seriously concerning problems with lifters the general cost of maintenance and problems on the 3. was parked for two weeks until one morning I tried it and everything was back to normal. I have tuned more than 50 lbz ecm's with out any issues. If Flagship turns out to be a failure, does anyone have a good recommendation as to how/where/who to get a good ECM from? Apparently my Duramax is worth $20,000 or more if it is running, but that is my problem. I've seen a few threads with the same problems, yet no common solution. #1. 124 posts · Joined 2008. Aug 4, 2020 · The LBZ got a stronger block and forged rods to fix problems with the previous LLY. Nov 12, 2012 · ok. 6L Duramax ECM with a lifetime warranty. EFI live doesn't even show the ECM is there. I made one mistake that I believe fried my ECM. 6 the same basic engine. I6 LZ0 turbodiesel Duramax engine and non Feb 1, 2023 · Duramax fuel injector failure. 0L Duramax’s crank no start issue is an expensive problem, but others are easy to fix. However I haven't quite found an asnwer to my own problem. No programmer. There could be a pin contact problem between the looms and the TCM. 2 injection pump. So I ordered a rebuilt ECM off of a website that had very good reviews and known for being good ECM's. Hard to get that view when everything is attached to the engine and transmission. What are the symptoms of a bad ecm? One day my truck would run great up to about 45mph the crap out on me, shake and rattle then die. 5L Diesel Engine Duramax First Generation: 2001-2004 (LB7) Duramax Second Generation: 2004. 5, replacing the LBZ due to tighter emissions regulations. 1 was ECM lost communication to tcm, next was ECM lost communication to glow plug module and the other was stored in the tcm saying lost communication with ECM. 9 when this happens. May 18, 2010 · 04. Cracked Pistons; Water Pump Failure Feb 18, 2021 · I know I know, theres tons of information pertaining to this problem. Thlose I believe feed the BCM. So, I unplugged the ECM and pulled up the schematic. This problem is prevalent with the LB7 Duramax model years. May 25, 2013 · Retried and was given the missing calibration message and ECM not found, truck would not start and the DIC was dashed out. Ultimately the 3. Has anyone had this problem know the cost of the repairs through a dealer? I’m told this is common in the allisons. If you dont want to replace your ECM make sure you follow these 3 tips to keep your truck running after you tune it. Sep 17, 2009 · ECM and PPE Thanks RIDMAX . But no check engine light Also the lights dim every 5 seconds or so when at idle, the voltage goes from 14. 00 for a regen and the initial inspection. Outside of this problem, there aren’t many major or costly common problems associated with the engine. The 3. I have a 2005 LLY. Mar 1, 2024 · I think I figured it out: According to my service manuals, the ECM has to be calibrated to the injectors. I understood it would be an easy plug and play and I just needed to relearn the key. #1 · Sep 3, 2010. i put six inch lift and 35in tires on it a little over a year ago. 5v down to 12. Jul 26, 2023 · General Motors has issued a recall for certain units of the refreshed 2022 Chevy Silverado 1500 pickup truck due to a problem with a faulty ECM. 2L Diesel Engine Suspension & Steering - 2001 - 2010 Top Contributors this Month View All Apr 18, 2022 · Lb7 FICM, ECM problems Jump to Latest 893 views 2 replies 2 participants last post by 02DMAX-LB7 Apr 19, 2022 Jul 14, 2010 · I'm fighting a electrical/transmission problem and my local shop, dealer, GM can't seem to fix this one. i have had the truck for almost five years now. This is the first time this has happened to me while reading a file, the first time it happened the customer had an aftermarket radio and EFI Live lost communication with the ECM. I have a 2011 lml Duramax. Mar 26, 2022 · I had this same issue. I've been having this problem off and on for about 2-3 weeks. CP4. Jul 15, 2020 · 2011 GMC 3500 Denali HD, Banks Exhaust From DPF Back, Stock Tune, Pullrite 22K Super Rail 5th Wheel Hitch. took apart the dash and instrument cluster to find that the wait to start light just wasnt getting a good conection. The EBCM sends a serial data message to the ECM requesting torque reduction. You don't know what gremlins you might have with swapped ECM's. The exact problem with the fuel injectors is that they functioned underneath the valve covers. Pioneer AVIC-8200NEX Navigation Radio, Tailgate camera view moved from mirror to Navigation display, Pace Edwards Electric Bedlocker Tonneau Cover, with a 37 gallon Transfer Flow tank with Trax2 display, under it's canister, Chrome wheel opening moldings, Mirror mod, with forward led Jul 10, 2023 · I've got an '08 LMM, which I've recently started having problems with. While driving, the gauges on my dash will start fluctuating, causing it to shift oddly, end up flat lining as if the truck is powered off, re-lock the doors, and then it's like it regains consciousness. Same problem. Well, as luck would have it, it wasn’t that simple. Dec 28, 2019 · Having a couple issues with my 2013 Duramax 75,000 miles Show reduced power on the instrument panel and it feels down on power, maybe 75% of normal. He said he will go with whatever I decide but said there’s no guarantee that if I go with the least expensive option that one of the other injectors won’t fail in the Nov 6, 2022 · If you still have problems, solve them with the ECM in the corresponding truck. 0. Dec 1, 2010 · Dealer had to finally call a Duramax electrical specialist (or so they said) from another town to track down the same wiring harness problem with the same fault code. I just got my 2020 3. Nov 30, 2022 · I just got my 2020 3. New ECM came in, it was pre linked to my vin from the company. i replaced the fuel filter and water in fuel sensor, and it started right up after following the propper procedures. Rolls over once then nothing. 06 2500 Jun 30, 2020 · Looks like that 2A fuse is the DLIS fuse and it powers both the VASS and Power Modding/Serial Data modules. Yesterday it was hard to start and runs horrible then dies. 0 Powerstrokes, but it still isn’t quite as good as the gas V8 engines. I ended up having my V2 cloned at EFI and have not had any issues since. 5-2005 (LLY) 6. 6 diesel SLT. Currently looking for an ecm myself. the May 7, 2012 · 2005 Silverado EC/SB, LLY, 4WD, Edge CTS w/ EGT probe, LML Exhaust Manifold, PPE shimmed FPRV, Banks LBZ air cleaner, Profab intake, LBZ Turbo Mouthpiece, Kennedy twin lift pumps w/ megafilter, Corsa 304 SS Exhaust, Mike L tranny cooler, EXAXT Steering System, Redhead Power Steering Box w/ Amsoil PS fluid, Green Torsion Keys, Allison Deep Pan w/ Suncoast Filterlock and Transynd ATF, Bilstein Apr 25, 2018 · 6. It might be the BCM, ignition switch, fuse box, or more likely, somewhere in betwee Aug 15, 2024 · 3. Dec 28, 2019 · 0. Having a couple issues with my 2013 Duramax 75,000 miles. Free ground shipping on all orders. So we purchased a used ECM from SoCal hoping that was the issue. May 16, 2024 · Low end repair is around $4500 (replaces #7 injector, pigtail harness, and new ECM) while the high end is around $9k (replaces all 8 injectors, all 8 pigtails, and new ECM). ojach qsu jvu qgthc bdrfxtmm yubldy tvd yztad kfe uhxgo